package com.ruoyi.common.utils.file;

import com.alibaba.fastjson.JSONObject;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
import com.ruoyi.common.exception.file.FileSizeLimitExceededException;
import com.ruoyi.common.exception.file.InvalidExtensionException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.uuid.IdUtils;
import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.io.FilenameUtils;
import org.springframework.web.multipart.MultipartFile;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;

/**
 * 文件上传工具类
 *
 * @author jiuyou
 */
public class FileUploadJsonUtils
{
    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = 1024 * 1024 * 1024;

    /**
     * 默认的文件名最大长度 100
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 100;

    /**
     * 默认上传的地址
     */
    private static String defaultBaseDir = RuoYiConfig.getProfile();

    public static void setDefaultBaseDir(String defaultBaseDir)
    {
        FileUploadJsonUtils.defaultBaseDir = defaultBaseDir;
    }

    public static String getDefaultBaseDir()
    {
        return defaultBaseDir;
    }

    /**
     * 以默认配置进行文件上传
     *
     * @param file 上传的文件
     * @return 文件名称
     * @throws Exception
     */
    public static final JSONObject upload(MultipartFile file) throws IOException
    {
        try
        {
            return upload(getDefaultBaseDir(), file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final JSONObject upload(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 文件上传
     *
     * @param baseDir 相对应用的基目录
     * @param file 上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名 和 保存在本地的文件路径
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws FileNameLengthLimitExceededException 文件名太长
     * @throws IOException 比如读写文件出错时
     * @throws InvalidExtensionException 文件校验异常
     */
    public static final JSONObject upload(String baseDir, MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, IOException, FileNameLengthLimitExceededException,
            InvalidExtensionException
    {
        JSONObject result=new JSONObject();
        int fileNamelength = file.getOriginalFilename().length();
        if (fileNamelength > FileUploadUtils.DEFAULT_FILE_NAME_LENGTH)
        {
            throw new FileNameLengthLimitExceededException(FileUploadUtils.DEFAULT_FILE_NAME_LENGTH);
        }

        assertAllowed(file, allowedExtension);

        JSONObject json = extractFilename(file);
        String filePath=json.getString("filePath");
        String fileName=json.getString("fileName");
        String filePathAndName=json.getString("filePathAndName");

        File desc = getAbsoluteFile(baseDir, filePathAndName);

        String fileAbsolutePath=desc.getAbsolutePath();
        file.transferTo(desc);
//        String endStr="_thumb";
//        String extension = getExtension(file);
//        boolean hasThumb=thumbnailsImg(extension,desc,endStr);
        String fileUrlPathName = getPathFileName(baseDir, filePathAndName);

        String fileUrlPathName2 = getPathFileName2(baseDir, filePathAndName);
//        if(hasThumb){
//            fileName= fileName.substring(0,fileName.length()-(extension.length()+1))+endStr+"."+extension;
//            fileUrlPathName= fileUrlPathName.substring(0,fileUrlPathName.length()-(extension.length()+1))+endStr+"."+extension;
//            fileAbsolutePath= fileAbsolutePath.substring(0,fileAbsolutePath.length()-(extension.length()+1))+endStr+"."+extension;
//        }

        result.put("fileName",fileName);//文件名
        result.put("filePath",filePath);//文件目录（不包含根目录）
        result.put("fileUrlPathName",fileUrlPathName);//本地访问路径
        result.put("fileUrlPathName2",fileUrlPathName2);
        result.put("fileAbsolutePath",fileAbsolutePath);//本地绝对路径

        return result;
    }

    /**
     * 压缩图片
     * @param file
     * 返会是否压缩了
     */
    private static boolean  thumbnailsImg(String extension,File file,String endStr){
        if(Arrays.asList(MimeTypeUtils.IMAGE_EXTENSION).contains(extension)){
            //图片类型可以是压缩
            try {
                String absolutePath=file.getAbsolutePath();
                String newFilePathJpg= absolutePath.substring(0,absolutePath.length()-(extension.length()+1))+endStr+"."+extension;
                File result=new File(newFilePathJpg);
                Thumbnails.of(file).imageType(BufferedImage.TYPE_INT_ARGB).scale(1).outputQuality(0.5f).toFile(result);
                return true;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return false;

    }

    /**
     * 编码文件名
     */
    public static final JSONObject extractFilename(MultipartFile file)
    {
        JSONObject result=new JSONObject();
        String filePath = file.getOriginalFilename();
        String extension = getExtension(file);
        filePath = DateUtils.datePath() ;//+ "/" + IdUtils.fastUUID() + "." + extension;

        //String fileName=IdUtils.fastUUID() + "." + extension;//编码文件名（放弃）
        String fileName = file.getOriginalFilename();
        System.out.println("ggdgdgfddf");
        System.out.println(fileName);

        result.put("fileName",fileName);
        result.put("filePath",filePath);
        result.put("filePathAndName",filePath+ "/" +fileName);
        return result;
    }

    private static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException
    {
        File desc = new File(uploadDir + File.separator + fileName);

        if (!desc.getParentFile().exists())
        {
            desc.getParentFile().mkdirs();
        }
        if (!desc.exists())
        {
            desc.createNewFile();
        }
        return desc;
    }

    private static final String getPathFileName(String uploadDir, String fileName) throws IOException
    {
        int dirLastIndex = RuoYiConfig.getProfile().length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        String pathFileName = Constants.RESOURCE_PREFIX + "/" + currentDir + "/" + fileName;
        System.out.println("ty888");
        System.out.println(Constants.RESOURCE_PREFIX);
        System.out.println(currentDir);
        System.out.println(fileName);

        return pathFileName;
    }

    private static final String getPathFileName2(String uploadDir, String fileName) throws IOException
    {
        int dirLastIndex = RuoYiConfig.getProfile().length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        String pathFileName = "/" + currentDir + "/" + fileName;

        return pathFileName;
    }

    /**
     * 文件大小校验
     *
     * @param file 上传的文件
     * @return
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws InvalidExtensionException
     */
    public static final void assertAllowed(MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, InvalidExtensionException
    {
        long size = file.getSize();
        if (DEFAULT_MAX_SIZE != -1 && size > DEFAULT_MAX_SIZE)
        {
            throw new FileSizeLimitExceededException(DEFAULT_MAX_SIZE / 1024 / 1024);
        }

        String fileName = file.getOriginalFilename();
        String extension = getExtension(file);
        if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension))
        {
            if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension,
                        fileName);
            }
            else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION)
            {
                throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension,
                        fileName);
            }
            else
            {
                throw new InvalidExtensionException(allowedExtension, extension, fileName);
            }
        }

    }

    /**
     * 判断MIME类型是否是允许的MIME类型
     *
     * @param extension
     * @param allowedExtension
     * @return
     */
    public static final boolean isAllowedExtension(String extension, String[] allowedExtension)
    {
        for (String str : allowedExtension)
        {
            if (str.equalsIgnoreCase(extension))
            {
                return true;
            }
        }
        return false;
    }

    /**
     * 获取文件名的后缀
     *
     * @param file 表单文件
     * @return 后缀名
     */
    public static final String getExtension(MultipartFile file)
    {
        String extension = FilenameUtils.getExtension(file.getOriginalFilename());
        if (StringUtils.isEmpty(extension))
        {
            extension = MimeTypeUtils.getExtension(file.getContentType());
        }
        return extension;
    }
}
